Washington, D.C., will drop its appeal of a federal court ruling that overturned the city’s ban on carrying handguns in public, Attorney General Karl Racine announced Wednesday. City attorneys will instead focus on defending concealed-carry laws adopted by legislators in the months after U.S. District Court Judge Frederick J. Scullin Jr. declared the ban was unconstitutional. “We need to focus our energies not on litigating old laws, but defending new ones that our leaders enacted in good faith to comply with court rulings while still protecting public safety,” Mr. Racine said. Up until Judge Scullin’s ruling in July, D.C. residents...